11875FHfalse[["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]]Theoriea795707a37410b0ddb1fe1efef108f5e1678Physics at the LHC and beyond<pre>
The annual DESY Theory Workshop is organized by the elementary particle physics community in Germany. The focus is on a topical subject in theoretical particle physics and related fields. More details can be found on the <a href="http://th-workshop2015.desy.de">conference homepage</a>, http://th-workshop2015.desy.de</pre>
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FalseDESY HamburgNotkestrasse 85, 22607 HamburgMain Auditorium2015-09-29T13:00:002015-10-02T13:55:002015-02-09T12:58:282018-07-11T12:41:34Europe/BerlinDr.Siegen University11ee3b4702432656449f9481f7ef7fe4103false[["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]]Topological strings and Siegel modular formsMr.University of Bonnb4ac97c3d773d981faa3b45722f49701Mr.University of Bonnb4ac97c3d773d981faa3b45722f49701Prof.University of Bonncc2e5d13d44e2472800e3792f739b5d5Dr.University of Pennsylvania8e5f9bf05f04ec2f2f392a749720db80Mr.Chalmers Technical University171ba4b3a4b23bedf54590d39eb51928DESY HamburgNoneSeminar room 12015-09-30T16:35:002015-09-30T16:50:0000:15The topological string theory partition function captures non-trivial invariants of Calabi-Yau threefolds. In general, target space symmetries acting on the cohomology induce an automorphic structure on the free energies. For non-compact geometries with spectral curve of genus one this allowed to re-express the physical constraints in terms of modular forms. The construction, however, relied on a certain quasi modular object, the second Eisenstein series. We generalise this procedure to spectral curves of genus two and show that the appropriate automorphic objects are Siegel modular forms. In particular, we propose an analogue for the second Eisenstein series and a generalised Ramanujan identity both of which have not previously been described in the mathematical literature.
On this class of geometries we provide a straightforward recipe for solving the topological string.slidesSlidesdochttp://indico.desy.de/indico/images/word.pngword fileppthttp://indico.desy.de/indico/images/powerpoint.pngpowerpoint filepdfhttp://indico.desy.de/indico/images/pdf_small.pngpdf fileodthttp://indico.desy.de/indico/images/writer.pngwriter fileodphttp://indico.desy.de/indico/images/impress.pngpresentation fileodshttp://indico.desy.de/indico/images/calc.pngspreadsheet fileotherhttp://indico.desy.de/indico/images/file_small.pngunknown type filelinkhttp://indico.desy.de/indico/images/link.pnglink